In no particular order, these are the books I have started or re-started reading this summer:
The Origins of Totalitarianism, Hannah Arendt
On Revolution, Hannah Arendt
The Rise and Fall of the Soviet Empire, Bryan Crozier
Injustice: The Social Origins of Democracy & Dictatorship, Barrington Moore, Jr.
The CIA in Guatemala: The Foreign Policy of Intervention, Richard H. Immerman
Piercing the Reich: The Penetration of Nazi Germany by American Secret Agents During World War II, Joseph E. Persico
Lord and Peasant in Russia from the Ninth to the Nineteenth Century, Jerome Blume
I doubt I will finish most of these.
Arendt is great - I really like Benhabib, who builds off and is influenced by her.